A coil has 200 turns. If an increase in , magnetic flux through one turn of coil is 0.001 Wb in 0.1 sec, then the maximum induced emf in the coil is ………….
A) 0.2 V
B) 2 V
C) 20 V
D) 20000 V
1 Answers
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In a transformer, the ratio of the number of turns in the secondary coil to that in the primary coil is 10:3. Such a transformer is called_______trans
Correct Answer - Electromagnetic induction
2 Answers 1 views
निम्नलिखित सेलों की 298 K पर नेर्नस्ट समीकरण एवं emf लिखिए । (i) ` Mg(s)|Mg^(2+)(0.001 M)||Cu^(2+)(0.001M)|Cu(s)` (ii) `Fe(s)|Fe^(2+)(0.001 M)||H^(+)(
Correct Answer - `(i) 2.68 v, (ii) 0.53 V, (iii) 0.08 V, (iv)-1.289 V`
2 Answers 1 views
298 K पर एक चालकता सेल जिसमे `0.001 M KCl` विलयन है, का प्रतिरोध `1500 Omega` है । यदि `0.001 M KCl` विलयन की चालकता 298 K पर `0.146xx10^(-3) S cm^(-1
Correct Answer - `0.219 cm^(-1)`
2 Answers 1 views
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Correct option is A) AB
2 Answers 1 views
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C) ‘n’ times as large as that produced by a single turn
2 Answers 1 views
Whenever there is continuous changes of magnetic flux linked with closed coil a current is generated in coil. This is ……………..
C) Faraday’s law
2 Answers 1 views
What is magnetic flux? What is unit of magnetic flux in SI system?
1. The number of lines of force per unit area is called magnetic flux (ø). 2. SI unit of magnetic flux (ø) is weber (Wb).
2 Answers 1 views
Define the following magnetic parameters. i. Magnetic axis ii. Magnetic equator iii. Magnetic Meridian
i. Magnetic axis: The Earth is considered to be a huge magnetic dipole. The straight line joining the two poles is called the magnetic axis. ii. Magnetic equator: A great circle in...
2 Answers 1 views
A vertical rectangular coil of sides `5 cm xx 2 cm` has 10 turns and carries a current of `2A`. The torque ( couple) on the coil when it is placed in
Correct Answer - 2 `tau=BAIN cos theta`
2 Answers 1 views
The area of the coil in a moving coil galvanometer is `15cm^(2)` and has 20 turns. The magnetic induction is `0.2T` and the couple per unit twist of t
Correct Answer - 1 `tau theta=BAIn`
2 Answers 3 views